Antenna for a pen-shaped mobile phone

Abstract

The present invention relates to an antenna arrangement for a thin elongated portable communication device as well as to a thin elongated portable communication device including such an antenna arrangement. The antenna arrangement may include a thin elongated ground plane, and a flat monopole radiating antenna element, the flat monopole radiating antenna element having a three-dimensional extension, being provided spaced from the ground plane along a longitudinal axis of the ground plane and encircling more than half of the longitudinal axis of the ground plane.

1. An antenna arrangement for an elongated portable communication device, comprising:
 an elongated ground plane having a longitudinal axis; and 
 a flat monopole radiating antenna element having a three-dimensional extension, where the flat monopole radiating antenna element is disposed at a distance from the ground plane along the longitudinal axis of the ground plane and includes a first antenna section including a set of parts that encircles at least half of the longitudinal axis of the ground plane, 
 where the antenna arrangement is configured to operate in an ultra wideband (UWB) frequency range of from about 3.1 to about 10.6 GHz. 
 
   
   
     2. The antenna arrangement of  claim 1 , where the first antenna section further comprises a feeding part joined to a middle part of the set of parts. 
   
   
     3. The antenna arrangement of  claim 1 , the set of parts being curved around the longitudinal axis. 
   
   
     4. The antenna arrangement of  claim 1 , where the set of parts comprises three planar parts, where one part is joined to another part at substantially right angles for folding the first antenna section around the longitudinal axis. 
   
   
     5. The antenna arrangement of  claim 4 , where said set of parts comprises a fourth planar part joined at a substantially right angle to one of the three planar parts. 
   
   
     6. The antenna arrangement of  claim 1 , where the flat monopole radiating antenna element further comprises a second antenna section provided opposite a middle part of the set of parts of the first antenna section relative to the longitudinal axis. 
   
   
     7. The antenna arrangement of  claim 6 , the second antenna section being planar. 
   
   
     8. The antenna arrangement of  claim 6 , the second antenna section being curved. 
   
   
     9. The antenna arrangement of  claim 6 , further comprising a strip line connecting the first and second antenna sections. 
   
   
     10. The antenna arrangement of  claim 9 , where the strip line includes a section that extends above and adjacent the middle part of the first antenna section in parallel with the longitudinal axis to couple to the first antenna section. 
   
   
     11. The antenna arrangement of  claim 10 , where the flat monopole radiating antenna element is configured to resonate at a first frequency and the first and second antenna sections are configured to resonate at a second and third frequency, the second and third frequencies being higher than the first frequency. 
   
   
     12. An elongated portable communication device comprising:
 a thin elongated circuit board including a ground plane; and 
 an antenna arrangement including a flat monopole radiating antenna element, where the flat monopole radiating antenna element has a three-dimensional extension, is provided spaced from the ground plane along a longitudinal axis of the ground plane and includes a first antenna section including a set of parts that encircles at least half of the longitudinal axis of the ground plane, 
 where the antenna arrangement is configured to operate in an ultra wideband (UWB) frequency range of from about 3.1 to about 10.6 GHz. 
 
   
   
     13. The portable communication device of  claim 12 , where the first antenna section further comprises a feeding part joined to a middle part of the set of parts. 
   
   
     14. The portable communication device of  claim 12 , the set of parts being curved around the longitudinal axis. 
   
   
     15. The portable communication device of  claim 12 , where the set of parts comprises three planar parts, where one part is joined to another part at substantially right angles for folding the first antenna section around the longitudinal axis. 
   
   
     16. The portable communication device of  claim 15 , where the set of parts comprises a fourth planar part joined at a substantially right angle to one of the three planar parts. 
   
   
     17. The portable communication device of  claim 15 , where the flat monopole radiating antenna element further comprises a second antenna section provided opposite a middle part of the set of parts of the first antenna section relative to the longitudinal axis. 
   
   
     18. The portable communication device of  claim 17 , the second antenna section being planar. 
   
   
     19. The portable communication device of  claim 17 , the second antenna section being curved. 
   
   
     20. The portable communication device of  claim 17 , further comprising a strip line connecting the first and second antenna sections. 
   
   
     21. The portable communication device of  claim 20 , where the strip line includes a section that extends above and adjacent a middle part of the first antenna section in parallel with the longitudinal axis to couple to the first antenna section. 
   
   
     22. The portable communication device of  claim 21 , where the flat monopole radiating antenna element is configured to resonate at a first frequency and the first and second antenna sections are configured to resonate at a second and third frequency, the second and third frequencies being higher than the first frequency. 
   
   
     23. The portable communication device of  claim 12 , where the portable communication device is a mobile phone.